IBM T221 - Manual (Page 25)

Chapter 4. Troubleshooting 19
Chapter 4. Troubleshooting
If you suspect something is not working correctly, you should:
1. Turn on the computer and monitor.
2. Set the brightness control ( ) to the proper position.
3. Make sure that all cables are securely connected.
4. Disable the computer's screen saver program if it is enabled.
5. Set the display mode to a supported display mode.
6.
If you still have trouble, go to the symptom list below and find the
symptom that most resembles yours.
Symptom list
Before calling your retailer or IBM, find the symptom that most resembles
yours, and try the suggested action. You may be able to solve the
problem yourself.
Symptom Possible cause Suggested action
Screen is blank and
power indicator is off No power to the
monitor No power to the monitor the monitor
are both switched on.
Check that the power cord is firmly
plugged into the electrical outlet and
the power supply unit.
If the power cord plug has a
removable fuse, replace it. Try
another power cord. Try another
electrical outlet.
Screen is blank and
power indicator is
steady green Brightness may
be too low Adjust the brightness
The monitor is in
Standby mode Press any key on the keyboard or
move the mouse to restore operation. Screen is blank and
power indicator is
steady amber
The video cable
is not connected Check that the signal cable is firmly
connected.
Check that no pins are bent in the
signal cable connector.
Screen is blank and
power indicator is
blinking amber every
second The display
mode of the
computer is
outside the
range of the
monitor Reconfigure the computer to use a
supported display mode.
Screen is blank and
power indicator is
blinking amber every
0.25 second An internal
monitor fault has
occurred Check that the power cord is firmly
plugged into the electrical outlet.
Ensure that the power adapter cord is
firmly connected. If the symptom
remains, call your retailer or IBM.
Image appears to be
smeared There is noise in
the video signal Check that the signal cable is firmly
connected.
Check that no pins are bent in the
signal cable connector.
A few pixels are
missing, discolored,
or inappropriately lit The LCD contains over 27,000,000 thin-film transistors
(TFTs). A few may fail causing pixels to be missing,
discolored or lit.
This is an intrinsic characteristic of TFT LCD technology
and is not a defect.
Is something wrong?